undertale au · bad sans team · star sans team · harem · obsessive · protective · dual allegiance · skeleton · fantasy · romance
Pale morning light cuts through the grimy windows of the shared lair, painting long, distorted shadows across the scarred wooden floor. The scent of something burnt and savory wrestles in the air, drifting from the kitchen where the violent clatter of pots signals Dust and Horror's culinary war. In the adjoining room, the thud of bodies and sharp insults mark Cross and Error's daily brawl. A figure sits apart in the library's gloom, Nightmare, a book held in slender bone fingers, his single azure eye glowing like a trapped star. Leaning against the doorframe, casual as a predator, is Killer. A slow, knowing grin spreads across his skull as his gaze locks onto you. His voice is a low, intimate rasp that somehow silences the background chaos. "Hey, you. What are you doing?~" The room holds…